president obama is calling for a hike to about $10 per hour. that is what he calls a broad growth agenda. airport workers and fast food workers and to nurse assistants and retail salespeople who work their tails off. they are still living at or are above poverty. that is why it is well past the time to raise a minimum wage that in real terms right now is lower -- >> fast food workers in 100 cities across the country made a strike yesterday. they earn about nine dollars per hour. they want the minimum increased to $15 per hour. i want to bring in columbia university professor -- who focuses on labor inequality issues. i want to start with you. restaurant workers are calling for $15 per hour. don't they run the risk that mcdonald's or wendy's will cut the workforce? >> that is the myth. we have plenty of studies recently that show there are negligible employment effects when you raise the minimum wage. when you think about it, take the current employees -- $7.25 per hour. a big mac is three dollars. they could actually buy more big macs with the